$OpenBSD: patch-src_ptlib_unix_remconn_cxx,v 1.1 2017/05/07 20:48:29 espie Exp $
--- src/ptlib/unix/remconn.cxx.orig	Fri Apr 28 01:27:22 2017
+++ src/ptlib/unix/remconn.cxx	Fri Apr 28 01:27:41 2017
@@ -39,6 +39,7 @@
 #include <ptlib/pprocess.h>
 
 #include <stdio.h>
+#include <unistd.h>
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #ifdef P_VXWORKS
